Clam-shell bucket.



No. 823,290. 'M' PATENTE'J'NE 1Q'. 1906.

M. J. PURTLE.

GLAM SHELL BUCKET.

APPLICATION FILED IEB.26. 1906.

2 SHEETS-SHEET 1.

M. J. PURTLE. CLAM SHELL BUCKET.

APPLICATION FILED TBB-26.19.06.4

PATENTED JUNE l2, 1906.

2 SHEETS-SHBET 2.

' bucket from one hinge to the other.

UNITED sTATEs PATENT oEEioE.

Specicaton of Letters Patent.

' Patented June 12, 1906.

Application filed February 26, 1906. Serial No. 303,114.

To all whom t may concern- Be it known that I, MICHAEL J. PURTLE, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented certain new and.useful Im rovements in Clam-Shell Buckets; and I do ereby declare the following to be a full, clear, and exact descri tion ofthe invention, such as will enable ot ers skilled in the art to which it'appertains to make and use the saine, reference Abeing had to the accompanying drawings, and to the letters of reference marked thereon, forming part of Athis specification. 4 v

lMy invention relates to clam-shell buckets, and has for its object the construction of a self loading and dumping bucket suitable for loadinlrand unloading iron ore, sand, and

other ike materials.

usual and ordinary construction, hinged to-` gether at the upper portion of their adjacent or open ends by the hinges a a, the pintle a of which extends across the body of the In Fig. 2 this pintlea is shown in dotted lines as passing through sleeves, as and for the purpose hereinafter set forth. To the opposite or rear ends (see Fig. 1) of the body portions A A are pivoted upward] v-projecting links B B BB by means of pint es b b, which extend entirely across the rear ends of the body portions AIA and are shown in dotted lines in Fig. 2 as passing through sleeves, as and for the purpose hereinafter set forth. lThe upper ends of these links B B and B B on each side of the bucket are referably pivoted together upon the pintle 2, which extends from one side to the other through a sleeve C. If

' desired, however, the said links B may be pivoted to a yoke at their upper ends by separate pivots. The sleeve or yoke is also provided with an eye or loop c, by which the bucket may be attached to a hoisting-cable D.

Mounted upon the pintles a and b inA each of the body portions A A are levers E E E E, the shorter ends e of which extend over the opposite body portion A. I preferably use four of these leversE-two over each body portion A; but it is obvious thatthe bucket may be constructed with but two levers'E- one `over each body portion AA-or with a greater number, as desired, or said levers E maybe mounted outside of the bucket upon the pintles a and b b Without departing from the spirit of my invention. To the u per or short ends e of the levers E,- I pivot lin s F (a link F for each lever'E) by means of pivots The upper ends of the links F on each side of the bucket are inclined toward each other until they are in line, when a pintle G is passed through holes in their upper ends, thus pivoting all of said links F together upon a common pivot.

In Fig. '2 the pintle G is shown'in dotted lines as thimbles etween the upper ends of the links I also preferably mount upon the pintle G a sheave ing-cable I, whichis shown in ig. 1 attached to the yoke C at the upper'ends of the linksV B. The sheave H ma 'be dispensedwith and the cable I-securedY permanently to the pintle G or to the u per ends of the links F; ut I refer to use tlie sheave, as it produces a dra t-line for the with the cable D.

In operation when the bucket is being low assing through short sleeves or H, around which o crates a closlinksn F directly in line ered upon the material to be lifted the cable I is slac ened, while the cable D is held taut, which ermits the adjoining hinged ends of the bo y portions A A of the bucket to drop,

the rear ends thereofl being held "up by the cable D, and thereby the portions A A and the levers E and links F arelowered until the body portions A are openedl to their eatest extent, when the two' cables D and 'are simultaneously slackened and the bucket dropped upon the iron ore or sand to be lifted. After the bucket has thus been dropped 1n an 1o en condition upon the material to be lifted t e lifting strain is put upon the closing-cable I, which operates through the links F and levers lE to close the body portions A A upon each other, at the same tlme scraping up. a large quantity of material. When the bucket has been closed by the cable I, the liftin bles and I, and they operate jointly to lift the bucket, with its` load ofjmaterial, and

strain is placed' upon both of. theca- IOO transport it to the dumpingplace, where the closing-cable I is slackened, which permits the body (portions AA of the bucket to o en downwar and dump the load of materiai Having thus fully described my invention,

so as to enableothers skilled in the art to which it appertains to construct and operatethe same, whatI claim as new, and desire to secure by Letters Patent of the United at the upper ends 'of saidl links, leverssecured ner or a to each ody portion hayin'g'shorterfends ex tending past the end of the' o poslte body portion, inks pivoted to the s ort ends of said levers and means adapted to "exert a lifting strain upon the upper ends of said links,`

substantially as and for the purpose set forth. 2. In a clam-shell bucket the combination of body (portions hinged together at their injacent ends upon a pintle extending across the bucket from one hlngel to the other, upwardly-,extending links pivoted to a yoke at their upper ends, 'pivoted to the rear o r outer endslof said body portions upon pintles which extend across said rear ends from side to side, a hoisting-cable secured to said oke, levers mounted upon said pintles witliT the short ends thereof extending over the oppoeaaeeoA site body portion, links pivoted to the short ends of said levers, a pintle passing through the upper ends of said links, and a closingcable adapted to exert a liftin strain upon said pintle, substantially as an for the purpose set forth. y

3. In a clam-shell bucket the combination of body portions pivoted together at their inner or adjacent ends, a intle extending through the hinge on each side of the bucket, upwardly-#extending links pivoted. upon a yoke at their upper ends, pivoted to said body portions upon pintles extendingacross the rear ends of said bodyy ortions, a hoistingcable secured to said yo e, levers mounted upon said pintles with their short ends extending over thefoplposite body portions, links pivoted to said evers, a pintlev passing through the upper ends of said links a sheave mounted upon said pintle, and a closing-cable operating around said sheave,fsubstan tially as and for the' purpose set forth.

In testimony whereof I aiix my signature in presence of two witnesses.

MICHAEL J. PURTLE. 

